JPH074144U - Vehicle display - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively prevent the occurrence of a ghost screen and to ensure sufficient visibility of the displayed image and indicator. [Structure] An indicator 2 is provided at a lower position inside a casing 1, an image displayed on the indicator 2 is reflected by a reflection mirror 3 provided above the casing 1, and is incident on a half mirror 4 provided at the center of the casing 1. Excuse me. With the mirror 4,
A virtual image I of a display image that is visible from the front surface of the casing 1 is formed on the rear rear surface of the casing 1. A ghost prevention panel 6 is provided on the upper edge of the front surface of the casing 1 in order to prevent the reflected light from the reflection mirror 3 from being reflected again on the windshield 5 covering the visual recognition opening 11 on the front surface of the casing 1 to generate a ghost image. The panel 6 is formed in a box shape and has an indicator lamp 61 provided therein. The rear surface 6a of the panel 6 serves as a ghost antireflection surface, and the front surface 6b of the casing 1 located at the upper edge of the front surface serves as an indicator surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular display device, and more particularly, to a structural improvement of a vehicular display device that forms a virtual image of a display screen of a built-in display device on a rear rear side of a device casing to perform display with good visibility.

[0002]

[Prior art]

 FIG. 3 shows a conventional vehicle display device of this type. In the figure, a vehicle meter, which is a display device, is provided below a meter hood 8 projecting into a vehicle compartment, and a casing 1 thereof has a visual opening 11 on the front surface thereof, which is open toward the occupant inside the vehicle. The visual recognition opening 11 is covered with a windshield 5 that curves inward of the casing 1.

A half mirror 4 is provided inside the casing 1 so as to be inclined with respect to the visual recognition opening 11, and a display device 2 is provided behind the half mirror 4 in a horizontal posture. The display 2 is provided on a printed circuit board 21 including a meter computer with its screen facing upward, and a concave reflection mirror 3 is arranged near the top wall of the casing 1 above the half mirror 4 along the same. It is set up.

The image of the vehicle speed and the like displayed on the screen of the display 2 passes through the half mirror 4 upward as shown by the solid arrow in the figure, is reflected downward by the reflection mirror 3, and is reflected again on the half mirror 4. The light enters and is reflected here inward (forward) of the vehicle. The light rays reflected forward become divergent light that forms a virtual image I of the display image on the rear side of the back surface of the casing 1. Since the virtual image I is formed at a position sufficiently distant from the eyes of the occupant, the occupant who is normally looking at the road surface several meters to several hundred meters ahead can easily focus on it and is excellent in visibility. Further, if only the display of the speedometer, the tachometer, etc. is made a virtual image display having a depth with respect to the other displays, a display having a stereoscopic effect is realized.

In such a display device, the light emitted from the display device 2 through the path indicated by the broken line in the figure is reflected by the reflection mirror 3, and then further reflected by the windshield 5 to be incident on the half mirror 4 and ghosted. Generate an image. Therefore, in order to prevent this, a ghost prevention panel 9 of a plate is provided behind the upper edge of the windshield 5 to block light rays passing through this portion after being reflected by the reflection mirror 3 from entering the windshield 5. is doing.

[0006]

[Problems to be solved by the device]

 By the way, the vehicle meter displays a continuously changing vehicle speed and the like, and also lights up by an indicator lamp such as lack of oil, running out of battery, or not wearing seat belt.

In this case, in the above-mentioned conventional display device, an indicator lamp cannot be provided on the upper edge of the front side of the casing 1 having the ghost prevention panel 9, and as shown in FIG. The lower glass edge 5b and both side edges 5c and 5d except the central portion 5a for displaying the image are used as an indicator surface illuminated by the indicator lamp 71 (FIG. 3).

However, in this structure, the display surface of the image is limited by the both side edges 5c and 5d, and the indicator surface provided on the front lower edge 5b is hidden by the steering horn pad or the like depending on the posture of the occupant. Can be hard to see. The important one of the indicator lamps is provided in the upper position as much as possible, but this limits the lower edge of the central display surface 5a.

The present invention solves such a problem, and provides a vehicle display device capable of effectively preventing the occurrence of a ghost screen and ensuring sufficient visibility of a display image and an indicator. To aim.

[0010]

Means for Solving the Problems To explain the structure of the present invention, an image displayed on a display 2 provided at a lower position inside a casing 1 is reflected by a reflection mirror 3 provided above the casing 1. And a virtual image I of the above-mentioned display image, which is visible from the front surface of the casing 1, is formed on the rear surface of the casing 1 so that the virtual image I can be seen from the front surface of the casing 1. In order to prevent the reflected light from the reflection mirror 3 from being re-reflected on the windshield 5 covering the visual recognition opening 11 on the front surface of the casing 1 to form a ghost image, the ghost is formed on the upper edge of the front surface of the casing 1. In a vehicle display device provided with a prevention panel 6, the ghost prevention panel 6 is formed into a box shape and an indicator lamp 61 is provided inside, and the back surface 6a of the ghost prevention panel 6 is a ghost. Together to such a protective surface morphism is a front surface 6b of the ghost prevention panel 6 located on the front upper edge of the casing 1 that none the indicator surface.

[0011]

[Action]

 In the display device having the above structure, the ghost prevention panel 6 is formed in a box shape and the indicator lamp 61 is provided therein, and the front surface of the panel 6 located at the upper edge of the front surface of the casing 1 serves as the indicator surface 6b. Is improved. By using this area as the indicator surface 6b, for example, the indicator surfaces conventionally provided on both side edges of the front surface of the casing 1 can be omitted, and the area of the visible surface of the display image can be increased.

Further, the occurrence of a ghost screen is reliably prevented by using the back surface of the panel 6 as a ghost antireflection surface 6a.

[0013]

【Example】

 In FIG. 1, a vehicle meter to which the display device of the present invention is applied is provided below a meter hood 8 protruding into the vehicle compartment. The casing 1 has a front opening facing the inside of the vehicle, and a central portion of the front surface thereof is open to form a visual recognition opening 11. A windshield 5 is arranged along the front surface of the casing 1, and the windshield 5 is bent toward the casing 1 to cover the visual recognition opening 11.

A half mirror 4 is provided in the casing 1 so as to cross it diagonally, and the back side of the half mirror 4 is supported by a support plate 41. The upper half of the support plate 41 is bent downward to open it, and the fluorescent display (VFD) 2 is positioned in a substantially horizontal position near the lower end opening of the opening 42.

The VFD 2 is provided on a printed circuit board 21 including a meter computer with its screen facing upward, and above the half mirror 4 above it in a substantially horizontal posture along the top wall of the casing 1. A reflection mirror 3 is provided. The reflection mirror 3 has a concave surface whose center is slightly curved upward.

The upper edge of the front surface of the casing 1 is in the form of a closed box having a substantially rectangular cross section and extends in the meter longitudinal direction to form a ghost prevention panel 6. The panel 6 has a rear surface 6a facing the inside of the casing 1 as a ghost antireflection surface, and a top surface thereof is provided with a required number of indicator lamps 61 in the longitudinal direction so as to project inward. Further, the front surface 6b of the ghost prevention panel 6 is an indicator surface (FIG. 2) made of a light-transmitting plate with a pictorial symbol drawn at a position corresponding to the indicator lamp 61.

The lower edge of the casing 1 is formed into a substantially U-shaped cross section to form an indicator portion 7, and a necessary number of indicator lamps 71 are provided on the bottom surface thereof so as to project in the longitudinal direction. A visual recognition window 72 is opened in the longitudinal direction on the front surface of the indicator portion 7, and an indicator surface made of a light-transmitting plate having a pictorial symbol at a position corresponding to the indicator lamp 71 is provided in an inner position of the visual recognition window 72. 7a (FIG. 2) is provided.

In the display device having the above structure, the image displayed on the screen of the VFD 2 penetrates the half mirror 4 and is reflected downward by the upper reflection mirror 3 as shown by a thin solid line in the figure, and is again reflected by the half mirror. The light enters the mirror 4 and is reflected here in the front passenger compartment direction. The light emitted through the viewing opening 11 becomes divergent light emitted from the rear side of the back surface of the casing 1, and as a result, a virtual image I of the display image as shown by a two-dot chain line in the figure is generated on the rear side of the back surface of the casing 1. The virtual image I is recognized by the occupant through the visual recognition opening 11 as display information having a stereoscopic effect.

By the way, depending on the path of the light beam from the VFD 2, what is reflected downward by the reflection mirror 3 is incident on the windshield 5 and reflected further downward, as shown by the broken line in the figure, and this is reflected by the half mirror. A ghost image is generated by being incident on and reflected by 4. Here, the ghost reflection preventing surface 6a on the back surface of the ghost prevention panel 6 projects into the path of the light beam that produces such a ghost image and blocks the optical path so that it does not enter the windshield 5, thus ensuring the generation of the ghost image. To prevent.

When displaying an alarm or the like, a predetermined indicator lamp 61, 71 in the ghost prevention panel 6 or the indicator portion 7 is turned on to display a corresponding picture on each indicator surface 6b, 7a. Illuminate the sign.

Thus, the area along the upper edge of the windshield 5 can also be used as the indicator surface 6b, so that an important warning display can be surely visually recognized without being blocked by the steering horn pad or the like. Further, since the area on the upper edge of the windshield 5 is the indicator surface 6b, the conventional indicator surfaces 5c and 5d on both side edges of the windshield (see FIG. 4) can be eliminated, and the display surface by VFD such as vehicle speed can be eliminated. 5a (FIG. 2) can be secured sufficiently large.

[0022]

[Effect of device]

 As described above, the vehicular display device of the present invention realizes a sufficient display surface and improved visibility of the indicator while preventing the generation of a ghost image.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a display device according to an embodiment of the present invention.

FIG. 2 is a schematic front view of a display unit of the display device.

FIG. 3 is a cross-sectional view of a display device showing an example of a conventional display device.

FIG. 4 is a schematic front view of a display unit of the display device.

[Explanation of symbols]

 1 Casing 11 Visual Aperture 2 Display 3 Reflection Mirror 4 Half Mirror 5 Windshield 6 Ghost Prevention Panel 6a Rear (Ghost Reflection Prevention Surface) 6b Front (Indicator Surface) 61 Indicator Lamp I Virtual Image

Claims (1)

[Scope of utility model registration request] 1. An image displayed on a display provided at a lower position in the casing is reflected by a reflection mirror provided at an upper part in the casing, and is made incident on a half mirror inclined at the center of the casing. A display device for a vehicle configured to form a virtual image of the display image visible from the front side on the rear side of the rear side of the casing, wherein light reflected by the reflection mirror is re-reflected on a windshield covering a visible opening on the front side of the casing. In order to prevent the ghost image from being generated, a ghost prevention panel is provided on the upper edge of the front surface of the casing, and the ghost prevention panel is formed into a box shape and an indicator lamp is provided inside the ghost prevention panel. The back surface of the ghost prevention panel is used as the ghost reflection prevention surface, and the front surface of the ghost prevention panel located on the upper edge of the front surface of the casing is installed. A display device for a vehicle, which has a indicator surface.